Bioelectrical signals

Bioelectrical Signal Analysis

What these are?Biomedical engineering is a discipline

concerned with the development and

manufacture of prostheses, medical devices,

diagnostic devices, drugs etc. And all these

require bioelectrical signals. These

bioelectrical signals are typically very small in

amplitude and require amplification to

accurately record, display and analyze the

signals

Measurement (Equipments)

heart (electrocardiogram/ECG);

muscles (electromyograph/EMG);

skin (Galvanic skin response/GSR);

scalp (electroencephalograph/EEG);

eyes (electrooculogram/EOG

Importance of Biosignals

Diagnosis

Patient monitoring

Biomedical research

Characteristics of Biosignals

Often hidden in a background of other signals and noise components.

Generated by highly complex and dynamic biological processes with parameters usually more than a few and varying continuously

Signal Conditioning

Biosignal Processing

In order to derive the required information from the bio signals:

-Disturbance should be filtered out

-The amount of data should be reduced by discriminating only the most significant ones related with the required information

Stages of Biosignal Processing

Signal acquisition Transformation and reduction of the

signals Computation of signal parameters that

are diagnostically significant Interpretation or classification of the

signals

Application of Biosignal Analysis

In ICUs integrating signals from multiple sourcespresenting information in the most appropriate form interpreting variations over prolonged time periods learning and recognizing profiles triggering “intelligent” alarms

Application Areas of Biosignal Analysis

Biosignals offer parameters that support medical decision making and trend analysis.

Bio signal analysis techniques help to extract these parameters accurately, analyze and interpret them objectively.

Applications of EMG 11

Applications of EMG in Ergonomics

► ANALYSIS OF DESIGN.

► RISK PREVENTION.

► ERGONOMIC DESIGN.

► PRODUCT CERTIFICATION.

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Applications of EMG in Medical Research

►EMG helps to improve

the medical research

studies by detecting

activity levels in muscles

and quickly identifying

muscle dysfunction.

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Applications of EMG in Medical Research

►FUNCTIONAL NEUROLOGY

►GAIT AND POSTURE ANALYSIS

►PROSTHETIC DEVICES

►ORTHOPEDICS

►SURGERY

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EMG For A Robotic Hand

Figure shows the highly integrated approach to use EMG recording of the human lower arm in order to control the opening and closing of three fingers of the hand.

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Applications of EMG in Sports Science

► Biomechanics is the

scientific study of forces

and the effects of those

forces on and within the

human body.

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Thanks…………